Improvement of the Botstein-Zacharopolous radiation applicator

Area of Science:

• Medical Physics
• Radiation Oncology
• Gynecologic Oncology

Background:

• Intracavitary irradiation therapy is a crucial treatment for gynecologic cancers.
• The Botstein-Zacharopolous afterloading radiation source is commonly used in this therapy.
• Existing applicators may present challenges in application time and imaging requirements.

Purpose of the Study:

• To evaluate a modified Botstein-Zacharopolous afterloading radiation source applicator.
• To assess the impact of the modified applicator on procedure time and imaging needs.
• To compare the efficacy of the modified applicator against the original device.

Main Methods:

• A new clamp assembly allowing independent control of ovoids and tandem was designed and implemented.
• A comparative study involving 74 patients was conducted, alternating between the original and modified applicators.
• Procedure times and the number of X-rays for placement evaluation were recorded and analyzed.

Main Results:

• The modified applicator significantly reduced the application procedure time (p < 0.001).
• Fewer X-rays were needed for evaluating the placement of the modified instrument compared to the original (p = .055).
• The new clamp assembly facilitated easier and more precise positioning.

Conclusions:

• The modified Botstein-Zacharopolous applicator offers significant improvements in efficiency for intracavitary irradiation therapy.
• Reduced procedure time and imaging requirements enhance patient comfort and workflow.
• This innovation represents a valuable advancement in radiation oncology for gynecologic cancer treatment.